Direct Observation of Austenite Reversion During Aging of 18Ni (350 Grade) Maraging Steel Through In-Situ Synchrotron X-Ray Diffraction

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorFeitosa, Ana Larissa Melo-
Autor(es): dc.creatorEscobar, Julián-
Autor(es): dc.creatorRibamar, Giovani Gonçalves-
Autor(es): dc.creatorAvila, Julian Arnaldo-
Autor(es): dc.creatorPadilha, Angelo Fernando-
Data de aceite: dc.date.accessioned2025-08-21T20:01:42Z-
Data de disponibilização: dc.date.available2025-08-21T20:01:42Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11661-021-06496-y-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/222897-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/222897-
Descrição: dc.descriptionAustenite reversion in Fe–Ni alloys plays a significant role in determining their mechanical properties. Increasing the austenite content in these alloys improves their toughness but reduces their mechanical strength. In this work, austenite-reversion heat treatments between 600 °C and 700 °C were studied in-situ using synchrotron X-ray diffraction and scanning electron microscopy (SEM) in an 18Ni (350) maraging steel. Aging heat treatments were simulated in three steps: slow heating (0.666 °C s−1), soaking for 1 hour at temperatures between 600 °C and 700 °C, and cooling with forced Ar. After the treatments, the samples were prepared for SEM and microhardness analyses. The reverted austenite fraction increases with the aging temperature, and this phase proved to be partially unstable after aging at a temperature above 675 °C, and it is transforming partially to martensite after cooling. In addition to the increase in the reverted austenite fraction, the coalescence and dissolution of precipitates occurred simultaneously and decreased the hardness.-
Descrição: dc.descriptionDepartment of Metallurgical and Materials Engineering University of São Paulo (USP), Av.Prof. Mello Moraes 2463, SP-
Descrição: dc.descriptionSão Paulo State University (UNESP) Av. Profª Isette Corrêa Fontão, Campus of São João da Boa Vista505, Jardim das Flores, SP-
Descrição: dc.descriptionSão Paulo State University (UNESP) Av. Profª Isette Corrêa Fontão, Campus of São João da Boa Vista505, Jardim das Flores, SP-
Formato: dc.format420-431-
Idioma: dc.languageen-
Relação: dc.relationMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science-
???dc.source???: dc.sourceScopus-
Título: dc.titleDirect Observation of Austenite Reversion During Aging of 18Ni (350 Grade) Maraging Steel Through In-Situ Synchrotron X-Ray Diffraction-
Tipo de arquivo: dc.typelivro digital-
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